Stainless Big Block For 396/402/427/454/502 Exhaust Maniford Shorty Race Headers

What is Stainless Big Block For 396/402/427/454/502 Exhaust Maniford Shorty Race Headers?

Stainless Big Block For 396/402/427/454/502 Exhaust Maniford Shorty Race Headers are performance exhaust headers engineered for Chevrolet Big Block V8 engines. Constructed from durable stainless steel, these shorty headers fit tight engine bays while improving exhaust flow over stock manifolds. With a 1.75-inch square primary tube and 2 x 4-1 collector design, they're built to increase horsepower and torque—delivering 10 to 15 hp gains. Designed for classic GM muscle cars from 1965 to 1975, including Chevelles, Camaros, El Caminos, and Impalas, they offer a direct bolt-on upgrade without major modifications.

Key features

• Material — Made of corrosion-resistant stainless steel for long-term durability.
• Primary Tube Size — 1.75-inch square tubing optimizes exhaust scavenging and flow.
• Racing Design — 2 x 4-1 configuration enhances engine breathing for better performance.
• Flange Thickness — 7/16-inch head flange and 3/8-inch outlet flange ensure secure sealing.
• Compatibility — Fits Chevrolet 396, 402, 427, 454, and 502 cubic inch Big Block engines.
• Included Hardware — Comes with metal gaskets and all necessary installation components.
• O2 Sensor Ready — No pre-drilled O2 bungs, allowing custom placement for aftermarket systems.

Who is Stainless Big Block For 396/402/427/454/502 Exhaust Maniford Shorty Race Headers for?

These headers are ideal for classic car enthusiasts restoring or upgrading Chevrolet muscle cars from the late 1960s to mid-1970s. DIY mechanics with intermediate engine experience will appreciate the bolt-on fit and included hardware. They're perfect for street performance builds, weekend cruisers, or show vehicles where improved exhaust note and modest power gains matter. Not intended for modern emissions-controlled setups, they suit off-road or vintage performance applications.

How does Stainless Big Block For 396/402/427/454/502 Exhaust Maniford Shorty Race Headers compare?

Compared to cast iron exhaust manifolds, these stainless headers offer superior heat resistance, lighter weight, and better exhaust flow. They outperform standard polypropylene rugs in thermal efficiency and durability. Unlike long-tube headers, the shorty design fits tighter engine compartments without requiring suspension or steering modifications. While lacking pre-installed O2 bungs, this allows customization for non-factory sensor placement. At $127.54, they deliver race-inspired performance at a budget-friendly price point compared to coated steel or custom headers.